A large-eddy simulation of turbulent compressible convection: differential rotation in the solar convection zone

摘要: We present the results of two simulations convection zone, obtained by solving full hydrodynamic equations in a section spherical shell. The first simulation has cylindrical rotation contours (parallel to axis) and strong meridional circulation, which traverses entire depth. second isorotation about mid-way between cylinders cones, weak concentrated uppermost part shell. We show that solar differential is directly related latitudinal entropy gradient, pervades into deep layers zone. also offer an explanation angular velocity shear found at low latitudes near top. A non-zero correlation radial zonal fluctuations produces significant Reynolds stress region. This constitutes net transport momentum inwards, causes slight modification overall structure In essence, thermodynamics controls dynamics through Taylor–Proudman balance. stresses only become surface layers, where they generate circulation ‘bump’.